 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui.internal.services;

 /**
  * </p>
  * A service which can appear on a component which is wholly contained with
  * another component. The component on which it appears can be active or
  * inactive -- depending on the state of the application. For example, a
  * workbench part is a component which appears within a workbench window. This
  * workbench part can either be active or inactive, depending on what the user
  * is doing.
  * </p>
  * <p>
  * Services implement this interface, and are then notified by the component
  * when the activation changes. It is the responsibility of the component to
  * notify such services when the activation changes.
  * </p>
  * <p>
  * This class is not intended for use outside of the
  * <code>org.eclipse.ui.workbench</code> plug-in.
  * </p>
  * <p>
  * <strong>PROVISIONAL</strong>. This class or interface has been added as part
  * of a work in progress. There is a guarantee neither that this API will work
  * nor that it will remain the same. Please do not use this API without
  * consulting with the Platform/UI team.
  * </p>
  * <p>
  * This class should eventually move to <code>org.eclipse.ui.services</code>.
  * </p>
  *
  * @since 3.2
  */
 public interface INestable {

     /**
      * Notifies this service that the component within which it exists has
      * become active. The service should modify its state as appropriate.
      *
      */
     public void activate();

     /**
      * Notifies this service that the component within which it exists has
      * become inactive. The service should modify its state as appropriate.
      */
     public void deactivate();
 }

